Using SNMP with Intersystems Caché

Intersystems Caché can be monitored using SNMP, but it must be started. The details of using SNMP in Caché are detailed in the Caché Monitoring Guide in Appendix B.

Firstly, to make life easier, the SNMP MIB for Caché is included in the installation of a Caché instance. Go to the top level directory (which contains the CPF file) and then change to the directory SNMP. This directory contains the SNMP MIB (named ISC-CACHE.mib).

Put this file with the other MIBs that your client uses. This will provide names and details for your SNMP client. If using net-snmp under Red Hat Enterprise Linux, put the MIB file in /usr/share/snmp/mibs/.

To start using SNMP in Caché (assuming your SNMP server supports AgentX and is already running), use this command (in the %SYS namespace):

%SYS> d start^SNMP(705,20)

The first parameter is the standard port for AgentX (705), and the second is a timeout value (default of 20). When you look at the jobs running in %SYS (using THIS^%SS) you will see a job named SNMP.

To stop SNMP, just enter (again, in the %SYS namespace):

%SYS> d stop^SNMP()

(Don’t forget the parenthesis; it won’t work otherwise.) Logs are written to the mgr/SNMP.log file.

Once SNMP is started, you can check Caché data:

snmpwalk -m ALL -v 2c -c public server .

This command is a net-snmp command, and assumes a server running SNMP v2 with a “public” community and Caché SNMP running. If SNMP is fully set up, you will get a variety of details about your Caché instance. The MIB file is well-documented as to what each element is and means.

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